Material:BK7 and ZF2(or according to your request)Dia.:+0/-0.05Center thickness tolerance:+/-0.1Surface quality: 60-40 Scratch/DigSurface figure:0.5-0.2Centration < 3arc minChamfer:0.1-0.25*45 degreesDesign wavelength:486.1mm,587.6mm,656.3mm(the parameter is demision of nomal lens,so specification will be changed according to different demision and material)